JPS6227494B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has a tongue-shaped armature disposed inside a winding frame approximately along the axis of the winding frame and supported on one side, the free end of the armature being connected to two mutually opposite sides. The present invention relates to a small polarized electromagnetic device which is arranged between opposing yoke plates, which yoke plates each form a pole piece which is connected to a permanent magnet arrangement arranged on the end face of the hoist.

A known relay of this type (German Patent Application No. 2459039) has a two-part hoist, in which a counter-contact part serving as a yoke is embedded, the contacts The chamber is closed by a magnet located between the folded opposing contacts. In this known structure, the permanent magnet has
It is magnetized perpendicular to the axis of the winding frame. This means that in order to increase the coupling area of the permanent magnet to the pole, the overall length of the relay must be increased, or the contact chamber or coil winding space must be correspondingly shortened. The coupling itself between the permanent magnet and the yoke element embedded in the two coil halves is also not optimal.

The object of the invention is to provide a relay of the type mentioned at the outset with the best possible coupling in all flux guiding parts, and in particular in such a way that the given space is optimally utilized in the construction of the permanent magnet arrangement. It is to be configured as follows. The permanent magnet arrangement should have as large a coupling area as possible and occupy as little of the overall dimensions of the relay as possible.

To achieve this object, the invention provides that the permanent magnet device has two magnetization directions opposite to each other and each parallel to the axis of the winding frame, and that the permanent magnet device has two different magnetization directions, one for each pole piece and one for the permanent magnet device. The winding frame is configured to have four poles so that the coupling surface with each one of the magnetic pole faces is oriented perpendicular to the axis of the winding frame.

By coupling the end faces of a four-pole permanent magnet, for example a ferrite magnet magnetizable in the direction of its short axis, it is possible to increase the coupling area between the magnet and the pole piece and to optimize the use of the space for the magnet. can.
As a result, the length of the magnet arrangement inside the relay can be kept small. Therefore, if the overall length of the relay is determined, the armature, for example the spring tongue, can be made longer and the winding space can be increased accordingly.

Furthermore, the tolerance when joining the end faces of two pole faces in one plane can be smaller than when a permanent magnet is placed between two pole plates fixed to a spool.

The permanent magnet arrangement can also consist of two permanent magnets with magnetic poles in opposite directions. However, 4
It is particularly advantageous to use a single permanent magnet magnetized to the poles. In that case, asymmetries in the contact forces or response values can be compensated for by appropriate balancing of the parts of the magnet arrangement, or even made asymmetrized. In this way, bistable or monostable switching characteristics can be obtained.

It is advantageous if the two pole faces of the permanent magnet device facing the pole pieces are connected by a flux guide plate arranged on the end face of the relay. In that case,
In one advantageous embodiment, as flux guide plate:
A ferromagnetic case lid is used, which can also close the excitation flux circuit at the same time. If the yoke plate is used as an electrical contact element as well as an armature, it is advantageous to arrange an insulating layer between the pole piece and the pole face of the permanent magnet arrangement. For this purpose, an insulating foil is provided, with which at the same time the end faces of the inner chamber of the coil containing the contacts can be closed.

In a particularly advantageous embodiment, the two yoke plates are
Each of them is inserted into a guide groove on the side of the winding frame and fixed so that it can be inserted into the guide groove. These guide grooves can each be provided with a support surface that precisely defines the surface of the yoke plate on the armature side, and a deformable rib can be provided on the surface facing it. In this case, the support and contact surfaces lie in one plane, so that the contact spacing is determined only by the tolerance of the spacing of the support surfaces within the hoist. In order to keep the magnetic resistance to the control magnetic flux as low as possible, a magnetic velocity passage portion in contact with the ferromagnetic lid can be formed in the yoke plate. Furthermore, in that case, it is preferable that the yoke plate has some lateral play in its guide groove. Thereby, the yoke plates can be respectively shifted toward the case lid so that the magnetic velocity passage portions are in close contact with the case lid, and tolerances can be avoided. In a particularly advantageous embodiment, the two yoke plates, which are integral with the pole piece and the flux passage, are of identical design and can be mounted symmetrically to the hoist by corresponding rotation.

In a further advantageous embodiment, both yoke plates are partially wrapped in synthetic resin as a unit that can be integrated with the permanent magnet arrangement. The unit can be reliably inserted into a corresponding recess in the winding spool by means of a projection, at the same time sealing off the inner space of the coil at the end faces.

The armature can be fixed in the conventional manner as a spring tongue or as a rigid armature supported by a spring on the end face of the relay opposite the permanent magnet and can be connected to the magnetic flux-conducting case lid. If the armature also serves as a current conductor, the armature must, of course, be electrically insulated in the same way as the yoke plate, and must also be provided with a connecting pin. Adjustment of the armature is likewise conventionally possible by applying mechanical or magnetic effects to its supporting position.

The invention will be explained in more detail below with reference to embodiments and the drawings.

1 to 3 show a compact polarized relay with a winding 1 that surrounds a contact chamber 2. FIG. An armature spring 3 is arranged in this contact chamber approximately along the axis of the winding frame, and one end of the armature spring 3 is fixed to a support piece 4. This support piece has a central part 4a extending parallel to the armature spring 3, and is inserted into a groove in the hoisting frame at both side fixing frame edges 4b. The central part 4a is only connected to the fixing frame edge 4b via a narrow bridge part 4c and can therefore be displaced by an externally applied magnetic field, so that the armature spring in the closed contact chamber can be adjusted externally.

The free end 3b of the armature spring 3 faces two yoke plates 5 and 6 which have contact layers 5a or 6a as contact elements. These yoke plates 5 and 6 are each bent to form two pole pieces 5b and 6b, which are connected flatly to each one of the pole faces of the four-pole permanent magnet 7. An insulating foil 8 is provided between the pole piece and the permanent magnet.

The yoke plates 5 and 6 are in the grooves 9, 10, 1 of the hoist 1.
1 and 12 so as to be insertable. These grooves then each form a support surface 9 that precisely defines the surface of the yoke plate facing the armature.
a, 10a, 11a and 12a are formed. Furthermore, the ribs 9b and 10 can be deformed into the grooves.
b, 11b and 12b are formed, and the yoke plates are pressed against the respective supporting surfaces by these ribs. Therefore, the contact spacing is between the support surfaces 9a and 10a or between the support surfaces 11a and 12 within the winding frame.
It is determined only by the tolerance obtained between a and a.

Both yoke plates 5 and 6 are each stamped identically from a single plate, as shown in FIG.
And it is bent. Simply rotate these two identical parts through 180° relative to each other so that their contact surfaces 5a or 6a face each other. The fixing parts 5c and 5d or 6c and 6d protruding from both sides of the contact surfaces 5a and 6a,
Among the grooves 9, 10, 11 and 12 of the winding frame 1, relatively long fixing surfaces are obtained. The magnetic flux passage portions 5e and 6e bent on one side provide a good coupling surface with the ferromagnetic case lid 13. At that time, in order to keep the magnetic resistance to the control magnetic flux as low as possible, the yoke plates 5 and 6 are connected to grooves 9 and 12 or 1.
It can be shifted laterally between 0 and 11. Therefore, the width of the groove in the hoist is 5 or 6 on the yoke plate.
has a certain play 9c or 10c for the width.

Furthermore, electric connection pins 14 or 15 are welded to the magnetic flux passages 5e and 6e, which pins are bent in such a way that they protrude from the relay case at certain frame dimensions. Further, a contact terminal 16 is attached to the bent portion 4d of the support piece of the armature spring.
is formed. Connection pin 17 to the coil
is embedded in the winding frame. permanent magnet 7
The end face of the winding frame 1 on the opposite side is covered with an insulating foil 18. The remaining space between the winding frame 1 and the case lid 13 is filled with casting resin 19.

FIG. 5 shows a relay with a slightly modified magnet structure compared to FIG. The hoist 21 is assembled with the armature spring 22 and the yoke plates 25 and 26, similar to the relay described above. Instead of the single four-pole permanent magnet used in the relay of FIG. 1, two permanent magnets 27a and 27b with opposite magnetic poles are used side by side. Insulating foil 28 is also used in this embodiment for sealing and electrically insulating the contact chamber.

Another modification is shown in FIG.
In this case, a rigid armature 32 is attached to a magnetic flux plate 34 by means of a support spring 33, for example, in a winding frame 31 constructed similarly to the previously described winding frame.
is provided. In contrast to the previously described embodiments, both yoke plates 35 and 36, together with the four-pole permanent magnet, are embedded in a common insulating block 38 which can be mounted as an independent unit on the end face of the hoist 31. The winding frame 31 has a recess 39 for this purpose.
The insulator block 38 with the corresponding projection 40 can be reliably fitted into this recess. In other respects, the structure of this relay is similar to that shown in FIG.

[Brief explanation of the drawing]

1 to 3 are sectional views of a small relay according to the present invention viewed from three directions, and FIG. 4 is a perspective view of a yoke plate used in the relay of FIGS. 1 to 3.
FIG. 5 is a sectional view of a part of an exemplary magnet arrangement having two permanent magnets, and FIG. 6 is a sectional view of a relay having an assembled unit formed from a yoke plate and a permanent magnet. 1... winding frame, 3... armature, 5, 6... yoke plate, 5b, 6b... magnetic pole piece, 7... permanent magnet, 2
5b, 26b...Magnetic pole piece, 27a, 27b...Permanent magnet, 35b, 36b...Magnetic pole piece, 37...Permanent magnet.

Claims (1)

[Scope of Claims] 1. A winding frame 1 forms a contact chamber 2, in which a tongue-like contact 3 is disposed substantially along the axis of the winding frame and supported on one side, the contact chamber 2 having a tongue-shaped contact 3 supported on one side. The free end is
It is arranged between two mutually facing yoke plates 5, 6 inserted into the contact chamber 2 parallel to each other and to the contactor 3, and the yoke plates are further arranged on the end face of the hoist. one pole piece 5b, 6b respectively coupled with a permanent magnet device 7
in which the permanent magnets 7 have two magnetization directions opposite to each other and each parallel to the axis of the winding frame, and the two magnetic pole pieces 5b, 6b and the two different magnetic poles of the permanent magnet device A magnetic flux guide configured to have four poles so that the coupling surface between each one of the surfaces is oriented perpendicular to the axis of the winding frame, and both magnetic pole surfaces of the permanent magnet device facing the magnetic pole piece are arranged on the end surface of the relay. In a small polarized electromagnetic relay that is connected to each other by a plate, a ferromagnetic case lid 13 is used as a magnetic flux guiding plate, and magnetic flux passing portions 5e and 6e are formed on the yoke plates 5 and 6, respectively, and contact the case lid at the sides. It is characterized in that the yoke plates 5, 6 are provided with electrical contact elements 5a, 6a, similar to the contactor 3, and that an insulating layer 8 is arranged between the magnetic pole piece and the magnetic pole surface of the permanent magnet device. A small polarized relay. 2. The relay according to claim 1, wherein the permanent magnet device is formed by a single permanent magnet 7 magnetized into four poles. 3. One of the two permanent magnet ranges is magnetized more strongly than the other magnet range that is magnetized in the opposite direction, and monostable opening/closing operation is performed due to magnetic fluxes of different magnitudes. The relay according to claim 1 or 2. 4. The relay according to any one of claims 1 to 3, characterized in that a foil 8 that closes the contact chamber 2 of the winding frame at an end face is provided as an insulating layer. 5. Any one of claims 1 to 4, characterized in that the yoke plates 5 and 6 are inserted and fixed into guide grooves 9, 10, 11, and 12 on the sides of the winding frame 1, respectively. or the relay described in paragraph 1. 6. support surfaces 9a, 10a, 11a, 12a, in which the guide grooves 9, 10, 11, 12 respectively define exactly the surface of the yoke plates 5, 6 facing towards the contact 3;
Deformable ribs 9 on the wall facing the support surface
6. The relay according to claim 5, characterized in that the relay has the following elements: b, 10b, 11b, and 12b. 7. Any one of claims 1 to 6, characterized in that the yoke plates 5, 6 are disposed in the guide grooves 9, 10, 11, 12 with lateral play 9c, 10c. or the relay described in paragraph 1. 8. Claim No. 8, characterized in that both yoke plates 5, 6 are of the same construction and are fixed in the winding frame 1 while being rotated with respect to each other almost symmetrically with respect to the axis of the winding frame. The relay according to any one of Items 1 to 7. 9 Connecting pins 14 and 1 to both yoke iron plates 5 and 6, respectively.
9. The relay according to claim 1, wherein the relay 5 is fixed.